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Old Apr 21, 2007, 7:15 AM   #11
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Thanks Mark1616 (and others).

I guess that is what it all comes down to.
I'm looking for a all round - walk round lens. (Won't be switching lenses). So I guess the Sigma 17-70 is the wiser choise.

I would just also like a very sharp lens. But judging from those comparison shots, I guess the Sigma is pretty sharp also.

It's just that the Tamron scores so much better in the Review from Photozone (like linked before).

Sigma - http://www.photozone.de/8Reviews/len...2845/index.htm
Tamron - http://www.photozone.de/8Reviews/len...0_28/index.htm

I'm leaning towards the Tamron.

One last request. (in this thread).
Can somebody link mr to the site where one can test out on an image how different lens zooms appear in a photo (it was an automated site).
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Old Apr 21, 2007, 12:51 PM   #12
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Before you lean toward the Tamron take a look here, the Sigma competes with some higher priced lenses. Just open the pictures then save them and look at them side by side. http://www.pbase.com/alexis/compare
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Old Apr 21, 2007, 2:33 PM   #13
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Yeah, I had already noticed that comparison (see 5 posts above).

I´m just going back and forth. Now I´m leaning towards the Sigma.
Guess this will end in a coin toss.
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Old Apr 21, 2007, 2:44 PM   #14
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You can find more reviews here -> http://www.fredmiranda.com/reviews/

I went with the Tamron 17-50mm for the constant 2.8. You'll have to decide what's more important to you. Lens design and selection is compromise.
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Old May 12, 2007, 5:51 AM   #15
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Great lenses.
Here you can find some reviews (about 218 models):
http://lensreviews.tk

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Old May 12, 2007, 6:23 PM   #16
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skuliaxe wrote:
Quote:

One last request. (in this thread).
Can somebody link mr to the site where one can test out on an image how different lens zooms appear in a photo (it was an automated site).
There are a couple of them that I'm aware of. Here's one that Canon has. Note that it assumes you're using a camera model with a sensor the same size as 35mm film. So, you'd need to set the focal length to a value that's 60% longer if you're using a DSLR with an APS-C size sensor for angle of view purposes. IOW, if you're using a 50mm lens, set the focal length on the chart to around 80mm (and it looks like 85 is as close at it would go) to get the correct angle of view for that lens on a Canon model with an APS-C size sensor.

http://www.usa.canon.com/app/html/EF...al_length.html

Here's one that Tamron has (it lets you select 35mm or digital and assumes an APS-C size sensor is being used with the digital selection).

http://www.tamron.com/lenses/learnin...comparison.php


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